Siemens simatic c7-621 - Page 56

Program Example 04/99
56 Getting Started with C7-621-AS-i
DB46:
OB 1:
Network 1 : Route process image of AS-i line to DB
OPN DB1
L PIW 256
TDBW0
L PIW 258
TDBW2
Network 2 : Call system component belt control
CALL FC 1
Network 3 : Call system component ejector
Call FC 2
Network 4 : Write outputs
LDBW4
T PQW 256
LDBW6
T PQW 258
BE
FC1: Belt control
Network 1 : Initial position
AN DB1.DBX0.0 // Opto_Bero: no parcel
AN DB1.DBX1.0 // Position switch: no parcel
A DB1.DBX0.1 // Ejector in initial position
AN M16.0 // No fault
= M15.0 // Initial position
Network 2 : Belt ON
A DB1.DBX2.0 // Belt_ON switch on casing
A M 15.0 // Initial position
S DB1.DBX4.0 // Conveyor belt ON
Network 3 : Belt OFF
A DB1.DBX2.3 // Belt_OFF switch on casing
O M 16.0 // Fault
R DB1.DBX4.0 // Output Belt_ON